You enter the Diefenbunker entrance tunnel via a small steel shack. The tunnel is lined with corrugated steel and slopes down to the bunker entrance then up again and out to the second entrance. The heavy steel doors to the bunker itself are in a corridor that Ts off to the right of the tunnel. A near miss nuclear blast wave would hopefully blow in one entrance and out the other with minimal damage to the reinforced steel doors to the bunker.

The Mk 6 Nuclear bomb is a very well done reproduction.

The Thermonuclear bombs look like actual bomb casings but were not labeled.